Walmart offers the Better Homes and Gardens Atomic Digital Clock with Moon Phase and Calendar for $20. Opt for in-store pickup to avoid the $5.99 shipping charge. That's tied with our mention from a week ago and the lowest in-stock price we could find by $11. It requires four AA batteries (not included) and features: wireless outdoor temperature (F/C) with trend arrows monitors indoor temperature (F/C) with trend arrows atomic time and date with manual setting option crescendo alarm sound 10-minute snooze feature wall hanging or free standing options